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The basement elements of Tasmania

Abstract

A new compilation of magnetic data over onshore and offshore Tasmania plus existing geological mapping and gravity data have
provided the basis for the production of map illustrating the geometric distribution of the main basement units of the state.
Significant aspects of the new interpretation map include: the delineation of the wide-spread sub-surface granite occurrences
in Tasmania; identification of more extensive occurrences of Proterozoic rocks than previously known; mapping of the extent
of the Dundas Trough and extensive northwestern and southeastern continuations of the Beaconsfield ultramafi rocks; definition
of the areal distribution of Mesozoic sedimentary basins; and the control of Proterozoic lineaments, in particular the Arthur
Lineament, on the development of the Mesozoic basins.